Title:	Two-step orthogonal-state-based protocol of quantum secure direct communication with the help of order-rearrangement technique
Authors:	Yadav, Preeti Srikanth, R. Pathak, A.
Keywords:	Orthogonal-state-based quantum
Issue Date:	Dec-2014
Publisher:	Springer
Citation:	Quantum Information processing, 2014, Vol.13, p2731-2743
Abstract:	The Goldenberg–Vaidman (GV) protocol for quantum key distribution uses orthogonal encoding states of a particle. Its security arises because operations accessible to Eve are insufficient to distinguish the two states encoding the secret bit. We propose a two-particle cryptographic protocol for quantum secure direct communication, wherein orthogonal states encode the secret, and security arises from restricting Eve from accessing any two-particle operations. However, there is a non-trivial difference between the two cases. While the encoding states are perfectly indistinguishable in GV, they are partially distinguishable in the bipartite case, leading to a qualitatively different kind of information-versus-disturbance trade-off and also options for Eve in the two cases.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/6181
ISSN:	1570-0755 1573-1332 (Online)
Alternative Location:	http://arxiv.org/abs/1209.4304 http://dx.doi.org/10.1007/s11128-014-0825-8 http://adsabs.harvard.edu/abs/2012arXiv1209.4304Y
Copyright:	2014 Springer Science+Business Media, LLC
Appears in Collections:	Research Papers (TP)

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